diff --git a/src/nl2gherkin/gherkin/generator.py b/src/nl2gherkin/gherkin/generator.py
index a8836c5..d595f31 100644
--- a/src/nl2gherkin/gherkin/generator.py
+++ b/src/nl2gherkin/gherkin/generator.py
@@ -2,13 +2,14 @@
 
 from dataclasses import dataclass, field
 from enum import Enum
-from typing import Any, List, Optional
+from typing import Any, Optional
 
 from nl2gherkin.nlp.analyzer import RequirementAnalysis
 
 
 class ScenarioType(str, Enum):
     """Types of Gherkin scenarios."""
+
     SCENARIO = "Scenario"
     SCENARIO_OUTLINE = "Scenario Outline"
 
@@ -16,6 +17,7 @@ class ScenarioType(str, Enum):
 @dataclass
 class GherkinStep:
     """A single step in a Gherkin scenario."""
+
     keyword: str
     text: str
 
@@ -23,21 +25,23 @@ class GherkinStep:
 @dataclass
 class GherkinScenario:
     """A Gherkin scenario."""
+
     name: str
     scenario_type: ScenarioType = ScenarioType.SCENARIO
-    steps: List[GherkinStep] = field(default_factory=list)
-    examples: List[str] = field(default_factory=list)
-    tags: List[str] = field(default_factory=list)
+    steps: list[GherkinStep] = field(default_factory=list)
+    examples: list[str] = field(default_factory=list)
+    tags: list[str] = field(default_factory=list)
 
 
 @dataclass
 class GherkinFeature:
     """A Gherkin feature."""
+
     name: str
     description: Optional[str] = None
-    scenarios: List[GherkinScenario] = field(default_factory=list)
-    tags: List[str] = field(default_factory=list)
-    background: Optional[List[GherkinStep]] = None
+    scenarios: list[GherkinScenario] = field(default_factory=list)
+    tags: list[str] = field(default_factory=list)
+    background: Optional[list[GherkinStep]] = None
 
 
 class GherkinGenerator:
@@ -45,7 +49,7 @@ class GherkinGenerator:
 
     def __init__(self, parser: Optional[Any] = None) -> None:
         """Initialize the generator.
-        
+
         Args:
             parser: Optional parser for validation.
         """
@@ -53,10 +57,10 @@ class GherkinGenerator:
 
     def generate(self, analysis: RequirementAnalysis) -> str:
         """Generate Gherkin from a requirement analysis.
-        
+
         Args:
             analysis: The analyzed requirement.
-            
+
         Returns:
             Gherkin formatted string.
         """
@@ -65,10 +69,10 @@ class GherkinGenerator:
 
     def generate_scenario(self, analysis: RequirementAnalysis) -> GherkinScenario:
         """Generate a scenario from analysis.
-        
+
         Args:
             analysis: The analyzed requirement.
-            
+
         Returns:
             GherkinScenario object.
         """
@@ -102,7 +106,7 @@ class GherkinGenerator:
 
     def _create_scenario(self, analysis: RequirementAnalysis) -> GherkinScenario:
         """Create a Gherkin scenario from analysis."""
-        steps: List[GherkinStep] = []
+        steps: list[GherkinStep] = []
 
         if analysis.condition:
             steps.append(GherkinStep("Given", analysis.condition))
@@ -130,7 +134,7 @@ class GherkinGenerator:
             steps.append(GherkinStep("Then", then_text))
 
         scenario_type = ScenarioType.SCENARIO
-        examples: List[str] = []
+        examples: list[str] = []
 
         if analysis.variables:
             scenario_type = ScenarioType.SCENARIO_OUTLINE
@@ -161,7 +165,7 @@ class GherkinGenerator:
 
         return " ".join(parts) if parts else "Sample Scenario"
 
-    def _create_examples(self, analysis: RequirementAnalysis) -> List[str]:
+    def _create_examples(self, analysis: RequirementAnalysis) -> list[str]:
         """Create Examples table from variables."""
         if not analysis.variables:
             return []
@@ -169,7 +173,7 @@ class GherkinGenerator:
         headers = list(analysis.variables.keys())
         header_row = "| " + " | ".join(headers) + " |"
 
-        example_rows: List[str] = []
+        example_rows: list[str] = []
         if analysis.examples:
             for example in analysis.examples:
                 if isinstance(example, dict):
@@ -186,7 +190,7 @@ class GherkinGenerator:
 
     def _render_feature(self, feature: GherkinFeature) -> str:
         """Render a GherkinFeature to string."""
-        lines: List[str] = []
+        lines: list[str] = []
 
         for tag in feature.tags:
             lines.append(f"@{tag}")